Dental instrument



F. J. BRONNER DENTAL INSTRUMENT May 26, 1 925.

" 2 Sheets-Sheet l Filed June 4, 1925 ll/lilll: allflixlallll. L :IIIIIIF. J. BRONNER DENTAL INSTRUMENT Filed June 4, 1923 May 26, 1925.

Sheets--Shaet 2 UNITED STATESl i .seam

FINN J, BRONNER, 0F BRADFORD, PENNSYLVANIA.

DENTAL INSTRUMENT.

Application filed June 4,

To all ywlw/n t may concern.'

Bc it known that I, FINN J. BizoNNiin, a subject of the King of Norway,and iesident oi'' Bradford, in the county of McKean and State ofPennsylvania, have invented certain new and useful Improvements inDental Instruments, of which the -following is a specification. j

This invention relates to dentistry, and particularly to a hollow drilladapted for use in penetrating bone structures such as v the jaws ormastoid processes of a patient in order to provide drainage (inabscesses) or to inject anaesthetics or other fluids into the nervecanals or. interior structure of the bones where such internal treatmentis desired. y

It is an object of this invention to produce a device which can beoperated by a dental engine as an auxiliary to the hand pieces of suchdental engine; and the said invention comprises what might be termed achuck to which a hollow drill is connected, the said device beingassociated with novel means for preventing fouling of the passage in thehollow drill'through which suction oi' drainage can be established orthe medicated fluid is to be forced after the drill has cut its way intothat part of the anatoniy to be treated, drained or anaesthetized.

It is a further object of this invention to produce a hollow drill orneedle such as is employed for hypodeimic injections and the like,associated with novel means for pre-` venting cuttings from entering theorifice in the drill or needle; the said device being intended to beemployed in association withv a syringe or liquid forcing agent wherebythe medicated liquid will be injected to the point where local.treatmentis desired.

1With the foregoing and other objects in view, the invention consists inthe details of construction, and in the arrangement and combination o'lparts t-o bc hereinafter more `fully set forth and claimed.

In describing the invention in detail, reference will be had to theaccompanying drawings forming part of this invention wherein likecharacters denote corresponding parts in the several views, and inwhich- Figure 1 illustrates a view in elevation of a device embodyingthe invention illus- 1923. Serial N0. 643,312.

trated as associated with a hand piece ofy a dental engine and a liquidforcing device;v

Figure 2 illustrates la sectionall view of the said device;

Figure 3 illustrates a sectional view showing the partsV in differentpositions of adjustment; l

Figure 4 illustrates a sectional view Lon a line corresponding with theline 4-4 of Fig. 3;

Figure 5 illustrates a View in `elevation partly in section, showing' adevice applied as an attachment for a hypodermic appaiatus; 'i l. Figure6 illustrates a view in elevation of said device; and f Figure 7illustrates a view in. elevation of the handle and cleaner embodying aslightly modified construction. i In these drawings, 10 denotes an'ordinary hand piece of a dental`engine,'and l1l a liquid forcing device,such as a syringe, that are conventionally showna'nd need not bedescribed in detail; The attachment comprises a shank 12 that is appliedytothe hand piece, although any other `suitable means may be provided'for its rotation; and the said shankextends into a cylinder 13 throughthe aperture 14 of a removable head 15, which hea-d is preferablythreadedin place. The shank has an annular flange 16 seated at the endvof the cylinder, and a packing 17 is interposed between the flange andthe inner wall of the head to prevent leakage when the device is inoperation.

The shank` extends through an opposite head 18 on the cylinder, Vandthe'said shank tained in the end of the vsaid shank, the said plugconstituting an anchorage for the cleaning pin 2 0 that `is used forpreventingr the accun'uilation of Yfoi'eigi'i substances in the hollowdrill, as will presently appear. The plug has a plurality ot'longitudinally disposed grooves 21 in its outer surface that forniclearances or channels for the passage of the medicated fluid which isto be injected through the hollow drill into the cavity to be treated.That portion of the shank within the cylinder has ak longitudinallydisposed slot 23 in which a pin 24 is slidable, the said pin beinganchored to the head 25 of a tube 26 that is slidable through 90 has anapertured plug 19 frictionallyfrethe saidconnection 29 may be employed.for

empleyed 'es l nieaton .of

the attachment of the syringe 11 or injector by which medicated Huidig,forced into the cylinder. Any suitable connection may be a means. foreffieeting`A` connnuthe .source of medicated fluid with the cylinder,and the inventoi'does not wish to be limited with respect kto* ,thesedetailsbuuias illustrateda when the-.syringe is applied .to .theconnectionand fluid is. forced into the cylinder, it Will resultinmoving yas the.y Vparts .of the positions in` which 4they are shown inEig. ,3 of the drawing.

During the drilling operation andwhen PRSSul-eis .beingapplied toforcethe. drill threvgh l the .etmeture being drilled, A the partevyillgassnrnethe position lshown in Fig. 2, but after the hand pressureincidentte the: drilling epe-tation has been removed and the injector isoperated. the 'forceior Preemfeineideflt te. the inieetilie el the.fluid wiillrieree the Ieylinfelel-eutvelflly with rrespect to the tube26 .andvcause thewvithf dreiival .ol'the .cleaning Pinfrem the. interiorof the hollowA .drill to permit the 'flow of fludthreughmheidrill. Byreason 0f .the iaettlltthe @leanings Pin-fiefwthn .the adrill denying@the dri-lling' epenltiou,` the duet Lhfeueh ,the drill Cannet: befouledby the eeumulatien l. :Ofi e1.L.1ttin.effs` 01" l the like. andhence/the .fereeneeeeearyter .delivering the medieeted. fluid tothe.eevityi te; be treated will=.bemnimzed 1.11: that i ferm etA theinvention-,Shown in 501:67 landfza aflhouowl nedle in communieationwithfaheaall havinga ,Socket .32 ylute .Wlieh melene may -be ponpedandit; is also adapted to receive the shank-ete handle 341 '1T he handle 34has e ,eleening Pin .135 thataextenfle .inte the needle,undythefreleten.of parte, .shown 'in Fig-:5r ienmnutenedfdueingf; the insertion oftho-needle. Aften-the needle has beerrinF sentedftheeellenkof thehemllel is removed frein the SOcket of '.thehead` and the cleaning pinie.w:.itlidrawnf fr0m the; interiorof lthe The Socket is such that@ ttngmay be applied to it, through which medicated fluid may beinjectedvfroma suitable syringe Y or the like. l. Y

Figurev'villustrates a modified construction in which thes ha-nliy ofthe :handle 37 is threaded, and when this is employed, the socket of thehead shown in Fig. 5 would -be threaded-'to engage'the threads of theshank. The cleaning needle 38 of the form p shown inv Fig. 7 is of thesame general type astliat lieretofoI-'edescribed, and the onlydifference between the device of Fig. 7 and that 'of Fig. 5 is that.provision is madefnA a more secure `connection between `the s hanlcoftheliandle and the socketjofthe head. AIn @the form` shown inl Fig. "5,lthe rela.- tion .otthehan'dle and l.the head is; maine tained ,byfriction. y

I claim: .Y y l. In a hollow vmedicated,liquid` apply-V Y ing device, ahollow penetrating instrument,

a .tube to which the instrument is conI neaelied,` a cylinderslidablyapplied tothe saidtube, the said tube and cylinderhaving rneansofcommunication, a` cleaning. pin Stationary with :relation te theinstrument rotating means, and `means whereby .medieatedglfluid is:delivered t0 the. interior. of. the cylinder, 2. In a hollowV medicatedliquidapplyf ing device, a. cylinder,.a v.shank rotatably mountedtherein having a longitudinally disposedl slot, a. tube. extend-ing..into `the leyll inderwmeans for. connetingthe shank Yto the. said tubevwllerely they` rotate inunison, e cleaning pin earredwby the Shank, a.hel- 10W penetrating instrument Seureden the tubev and rotatable.therewith., theead tube and. shank having means of communication, andmeans, fopsupplyingmedcated fluid to the-cylinder. -In a hollowmedicated liquid applyingudevice, a rotatable/.member adapted to be`driven..-loyanenginaa .member slidable thereon-androtatablmtlierevvith, means of communeation` between A the.t twomembers,

.a cleaning pin carried. by the firstmentioned; member landextendinginto. the secondmentioned member, a; hollow penetrat- FINN J.BRONNER.

